"I cannot overestimate the importance of observing every little thing and of reasoning upon it. The history of invention is full of incidents in which apparently trivial observations have proved of immense value to the world...The inventor... looks upon the world and is not contented with things as they are. He wants to improve whatever he sees, he wants to benefit the world; he is haunted by an idea. The spirit of invention possesses him, seeking materialization."(Alexander Graham Bell)